A tempting move, but not the best.
15. f3d4  15... g4e2 The alternatives are worse: 16. d4e6 Now the rook on f8 is attacked and Black has no option but to capture the knight. 16... f7e6  17. c3e2 Now Black needs to be fast, as White has a long-term positional advantage with the bishop pair and better pawn structure.